Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc452ceda46c01f71cb754119f72804e70c30e8763d6186d03e75be74e6f3642' 
  AND token = 'JOOuSv+esQC4jw7DqT+5fa3c2mc9qKrpzns0BJ4wDsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}