Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40dd9844dc91a9b95b8ff657de2b40e215b0068441cc13aa9d1ef77cf196f9d6' 
  AND token = 'dS9pAw81jwWJS8WXsb909CwxR5FcYmJnM6590CIN1Ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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