Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66e98917c4807880be3da7a6405e1070ed5eee6846aeedd36e04b647f7c5eb56' 
  AND token = 'OUVD+gd/t3Gj0j+kaZn4yJ+s/v/MhtYBjM/4YRdOupI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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