Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24f8064c7319eed47321845a9b6f141efb94fe02257f5587f5cc660186939325' 
  AND token = 'pEFPXJRBXU3SFia2MA8JAXPyUQTAMTx2w1qjYq08OE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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