Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c0526f87222b43d565f7db7a87231276efcc5b57d2a99eae3cdce77bffd628d' 
  AND token = 'vrEhX6mSeDYA7S+VIQKxhxVd1La6sdXFItq1i98UDwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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