Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '512c549dd0498c4a4232e451ab64ed4a7b8b0aea107110af84e175c370311108' 
  AND token = 'mUen7szqkQzbfJ7CTPj2JRTAJ4/ke1vMvIKDrTQRFpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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