Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cfe281b3f4ac5030be26f7c1f1f05f3c1375a308327daebfac37197d3312a9f' 
  AND token = 'IZjCWD6oTaxMqfuOBUHzD5MR7YdUKAZrPXr6budZFdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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