Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fbbb1b462d6e50c777efc7455e5c46a4e85f09d9f769ba8a1e96418554a2564' 
  AND token = 'u6OgT/mp6CE0TfVCWJFDp+DN2p15mq1bzmLXzKmT4o8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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