Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dbbe698a0496103f4581dfa50c2535eb11f8c62e1371d130b99e654ac6feda0' 
  AND token = '/xLRvR+03j4PtXjA/tQgEljF6RvSLGD3ihZj6/UILhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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