Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '458152690e2204dda3c7cad1cceeda2c62aac7b7d990e75f3ed422141252b6e9' 
  AND token = 'J1i83rNkhpGRGzM+ki/EFo17YvBToI8fUNuPtpEb6Xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}