Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd39a0dd93888862756755a2e0fe941868ba27364ab52f9e8a554e15b28398049' 
  AND token = '0WvY2oc01TcqBvfi222TbgYQWZWby49Jxt5rKnaydkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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