Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0091739f95d0270bef7cd2e4561a25a6000c9a3423ca2efeb3d2f5a31853fc4' 
  AND token = 'Of4PrMm33xaElQPGnP115p3+LcNX8cBFx21j2e6SKBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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