SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95bd47afede3c676b1a74ab2daff58702469842151f762d38968a744802511d2' 
  AND token = 'r+GDwG7UwrQsBZkz3wM49AiqUa4HpVBP4u/iBKHn2/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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