Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0400397c5dcc1b08e4211ea772892960e25cfe7530de00215ba16467820bd347' 
  AND token = '8oKvuMWsDVYfbrAsJiHZ6LkiTg1BY1odl61q5NxhfnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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