Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99c4c093ad9e1c02b3fdb992ca2570c5ea192e39314b39f813384a886ad211af' 
  AND token = '1kXtg+spFS3BD801WVmo23Z5duX2kNcyZ+t0lTSVRas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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