Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61cd899bf0b31f3f948efa3fd5c3ca291fcbc4328a8c3ec50700ce9b51276d71' 
  AND token = 'R+rATWlqlnYIcyOUe0J6oo8wfhZCBJmbTTTpG8V3Nbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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