Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8872fb03dc899d6c3ad2db0b138afd8cd37391a03ce7ddb2f95baa01d83d4fa2' 
  AND token = 'AQECN3q9tUiUKdVCqqx7Zqq0onMwIYCYpHNk/UhYeMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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