Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '773443cf2f8057d8af1ed2be15911b476cc65a15c950007d2655994e472c42d0' 
  AND token = 'ymFIxJleHc2o7tvqLnvF2MoIafDQ5wVT7XyeilVn6kE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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