Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec849f3f56a9e62da435f1660804f6080f9689cc3bd5def3fc6fbbbcd40a920c' 
  AND token = 'noDJtseaX9rWuPefMuZr/cObOtsXpVyKhfQTv5h5tks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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