Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a099d34db036f601dbf96801111881beb4d30c9c0c0c4402361dd1ad94adc5ae' 
  AND token = 'W0tIdS5irJnA33CWOYXc9UQMPthY35qpIxG9HI7l4J0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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