Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '951b27ba4813f9dfec4da4f49f3ce443b875717136dfa49a357fd4d7c7f0fd93' 
  AND token = 'QnLtEGx6N0fE5PYbOv4O1YuH4CdFSURdsNgrFZuIi1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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