Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0c37632dd5ac61aecd68b874e94e9bf257e10e9e88cf68be3215165feca6316' 
  AND token = 'YjTEh+ketfPlXQxuK17Cgc8/1PD1hxqvOyO7KPvuvGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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