Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45dce1fed842d692578fb2c114846225122a24bf76732723ec1f176723e068b1' 
  AND token = 'd9TyEAn4KiTapDS7F+sWm6yWAJPKQLUU7mOClm7SQzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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