Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3558a5d886023392eb3c3772a89ce74fe7935d7ca9fe90a1e1df9031e3465966' 
  AND token = '0gRDkkdTWWiMx1DoJC46sd8qxOEccvu9fRacLgEHdcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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