Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '828d5d67d0f0557c2d8ed85f5e648510408bf94c537c701c68e3d67d31ae1ccb' 
  AND token = '9kvpRfcFgrqZvHlQk0D/xVzXgbX0TKjspRRq0rIiTos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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