Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53f1fe7ec65a268062291440fa84228ff1afa0a2a122b237a446d5452ab187ab' 
  AND token = 'XFhTROGlG88xiE9iYMMHS+F2hn07rDbprhoPmG3pscU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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