SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc4da239caee44519fb149c366ddd171ce582288c3059ecfd0fe315020f7291a' 
  AND token = 'CYdWuxi/Ux13XuZQvysR/JWysVxexlinhaR/bB/qK/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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