Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '776bdcd5b31db65aa99c09820f7fd7cc756794e4eee38269eb098b382872c958' 
  AND token = 'LnOYXblmyW8LF8sUeXbgniJ7H3uetPebdRHzpdHobFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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