Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc48bccccf1ccc85eb2b03ba2c3f78322479112cc8277af49933878ae26c5b17' 
  AND token = 'jAnMHAYKvzOtzTTfpkZKjEEiuueECBcefp6PeGH3L6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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