Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd3da64565663321a7b714004923cd591248fb2aa846050ea477cbb1e1e0db95' 
  AND token = 'UWy3Gq1VqAsSKJ7usE20rK3XslAtmUc7vBRZ9sXqtwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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