Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e90889593ba92a1bb45fd70b8776130e04122d5281ec5048b3f0f26e02c8616' 
  AND token = 'Hp3dvd7ZJr36xy1PMrpJlkOqhjkXjK5Qhw1HGEEk1r0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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