Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505947565e0b30c74188e73ee50a4efa5b3f753eb39df07cac7dab57f26ef7ed' 
  AND token = '1h/xKUCh+j1m+UmMR9iLYXiF2Yo1PrEO+HeQHmhbtfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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