Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d0c45a2e432d07c22c55d43be1c0105c6d1a6fe3366e6e6c417b3c6b709e270' 
  AND token = 'MVLQ5iMk9Kp8vTfXv2Laq7aFRAfmSFxo1Gc35OafRsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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