Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2184988349c6b669b3d77ff5f0fdff1b4f1420f0bb763311a9a51824096f6559' 
  AND token = 'GYJD8xgjH/ieNlq3DapSy81D2WaCi3Ipax3KmqoiwUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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