Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1eccf7f6e93f2c094806e703284a96262b49a4206263e9143b40461fc155524' 
  AND token = 'c2UvneppKUrdFiQzYRqWq9UGtHRSdcUfFjZ0e9anAak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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