Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '919918e73783fb2a76e98b3b55c90d290a466cde8a82c229ac47cdfd88ffa6d9' 
  AND token = 'ejcyV7DcP+NIpVbDwY4RWXofGXLUm+q7CkVrIOB9YoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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