Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f080817da7bccdc3a13dcc1ed5427d9244312fd5125750f105de71df012f17e3' 
  AND token = 'JVx0sezjALEhYab9yVCii8wbR91L1S30JjblDMJRMHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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