Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da90d224c6fd96ebcd8ce48767367cdcc978471688ebd7bcc419d04ab83ffedd' 
  AND token = 'xBxYqVJlReN1a8LRby7VtazNrDaudmou+tXfHGYdQ9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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