Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3702446aa9cfc2feb264b4abb676c400072f261faf70e8c8b7dff1becb510c87' 
  AND token = 'igY4Lo4aOJnt0uNCJHLdEjOUXft/6W3IeoqYfDXYCOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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