Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '300fe8f8a16f89009383ed1e9f3339d709c31be15890329799d7d2fb138d6a2d' 
  AND token = 'ng/HtaAYmI1i+cnTO0WqDJOaBfzLybXnrrBcu85q0tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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