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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67d2ffef698da662dbbdf85d4632ef5a37a78638285ca2f7542919c4ef560bf1' 
  AND token = 'B0+Amxwta3Z7o5e9j2iZHQmYmQeO7Z6fhnx0IUJy5H4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}