Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '482bd6ccafcb34e1858c241ae994318b15aec2b41316a64dd6650bbd35e3efb4' 
  AND token = 'a5XjIey+zN77cBtFE4KE3fhRvBgQ9b2CFHtnCkMo83I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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