Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '334d2c2aa8645dae034a5d1e707d9d95ce2c859131f1b43b85dc2dc8b50be848' 
  AND token = 'JzdJfI3TIJ/G055TbIGZuNSK31zcNvkYbRx61JKd53I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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