Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e409c85842394fbabe859b2f373f33df9d49d2e201786d65d8f9853b89f03155' 
  AND token = 'bWe/QiC9iMHvLhKMuV5maKL35hcE1GrSJb5B5crswRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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