Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66a57e9facca9b3ea9643efea12dc0deeb62cb40d64c47e40f1591a10e5e1090' 
  AND token = 'vIxeCmbmBU0ghRLN/wOOFJsbT5hmUqdB25bRS9nYPrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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