Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a53d89567a8ffd2b08ba9440ecfae518786c98daabe263ca050e884ae6cb046e' 
  AND token = '3p5fIOd6GJd2aORK8CHo/eke97tiSPeS+LdZ31MDXwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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