Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a51cec07f52c3024d882baaaa3ac9b92cdf22d093873c3679404b8e7527272e3' 
  AND token = 'BghaAn7DnspfxACo0ucHawmJL62l7Iw2J1MXCyKmeOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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