Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43a28444f56a47714f38a034ed22e905293dca26e1a08a4611a5ed5382350012' 
  AND token = 't4BlOYk8aw6lH45birosxzZwt2oS5txruI5EPy5DyU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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