Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccc8d8be41be60a31d48a55fdf959bf0cca80a7f01fffc8f1b430da63d6e1ffa' 
  AND token = '9MNnCiand8EdbNTkouy7TsOsMUJdSm0v6cW2fPFCNOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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