Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51a55da0eda4dd4f3cffda68c6f673597798a2719a297400a4936ee39e971068' 
  AND token = 'OB6hpep4fuV8Cq5dhjUTO8ecn5AXNZelqbiPEnuO/9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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