Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0747fd4b1bcffb357612fd0d58515a811131ea429cb76d3af90665e164440326' 
  AND token = 'HFT4n0Xj45pfCP56yccmCs9EuT2O7x1NlpXA+UR3veU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}