Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78162a3074908478bde7ead18b8b7592574e1dd552f042f4d7a4a464bc35ed81' 
  AND token = 'zXHNhPnX/3d7Yv2EjFR2zulu/BdDCfS1geIvzsFc+D4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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