Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49323556198588e5ec97c1e88fc05c7c35a4ca68f8bf3108842c4024bd637dc5' 
  AND token = 'oJeR4EtNW/x54/eh31gV9nkGwosMj45TsSR6gXwLLgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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