Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6da99acea2bd538002ea127def890f1dd10a7dab8105abf444aeab0bd8bee9d2' 
  AND token = 'KBhb0t56qOZHsQCL7oAjoJm9UYh+mGnMi5ISshX+khk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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