Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '372a9db3d1cf34f2128c72876bed69d413b5614db3a6fb96f5624489f1756521' 
  AND token = 'VNQXcLzu3LuTRlWJ+wSeycPl+QwR6E4aZRqPwbf5eWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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