Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ee6a4c03d52778cf532c0709b97be2a0dbdfd69862ef081e6c143567a054a67' 
  AND token = 'zMKwsX65yijg+3tgRLrCoKCEaoXd1Bav1Shxpm3GmmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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