Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aad332f499ae3b4efd6e3c8468b8429153e9a1bc577a5133fc77bf45a7735dd7' 
  AND token = 'I6vGqQjWNW5FwndLMjmLrs7d93kcj0Z48w4A0uErfOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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