Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2620a7877dd660e6895ed2bb076072df746ade1662d784b44f266120aff76b56' 
  AND token = '1t+NLuYvx1mYlanlNXx2wKK0+aHpi6a0JBMFqWcqw7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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