Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43e76c6b2a8799a95cc8ce3763f4558c55e2068770e30181c549b6556a89ca6c' 
  AND token = 'i/2mEerxgti1Ypibh3t6B6tZsdAmzRN9p0s1HKcsEFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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