Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb6ab611c29bb2f3b3bddc7b4c972253ba1a1806e4855cdcd92be70bee969667' 
  AND token = 'eK8CQ3n625tpkyhFu43YTcblb36uyCcorpqnggoWNm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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