Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acaf834d5bdaccb1afa76689e1f713ecb6d12c8e85c0e350eb76128e48c98915' 
  AND token = 'tksD5qyxm965RLAGKMZGrXx2Vy0M0rIsBdr8AjpWOs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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