Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21ebfaa1d6e86a66994f852a9a77cac53e0147747638d9b0fad1f4b650b3cad1' 
  AND token = 'aCM5hBnfIhzI+BYbmge3iBgmTQySklgvjccwH9Q09Vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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