Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ab3a6c12d81783b07e5fc121f07f4d4dd9d9ea2870665eaffc132f96ccb32c0' 
  AND token = 'fhmJTXw4B6k6J/dsvEXV8zUFGU0cMdoRl0Ezw/CbanU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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