Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aff5434a852f136585b55d6b7beed772316559b6daad8def5a238d1316c57252' 
  AND token = 'CnM/AVCwGn5jwrsVJdz9mEJd9M2tXjjWfT+C5ytywos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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