Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00ae92ece6b80d2c592bcae15b93e16a8618a66559669d1368cbf8f627f242f6' 
  AND token = '7O0aMvdbwyr9HajPHRZY9zBMptO8+Csm/iYCxRSDYbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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