Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43b4bc2deae499d06a5ff24e559d7946d2696ad911f8ac08d171b292592eb08f' 
  AND token = '4j1COfLTVXcqQ12grZBEvZHbZfGyJoLjieJ0gc2olHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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