Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '88f72402f7bbdd8f144b8da77bd102d42bce047add6ccbf5aaf5e162a6c7d484' 
  AND token = '7pkVNlB4NxqXDCskvOr4aWiBO5XImnwRioixbGt7pgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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