Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb4ee5aaa95d5acc01ba456a4bc143903b260fdffb300a5ec4833687ef2e749b' 
  AND token = 'E2bFw1XVAPKNM/UxzQeo9xkmWUlqlDUREAW+5ALKprs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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