Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72935b11d9786f4bd81ddecc94b46962ba99b5142ff3f4bd4dc64819205901f1' 
  AND token = 'FfIRj9NmIYLmdHbXxyayExf/UnMCLb+BjrnxNmvzr9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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