Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f3888922674e3b2ee32e7fddf90bd1c14556e0adcf2a833811048936667196b' 
  AND token = 'Xyxs9+TB2Pu8Gizy5FRxV8XlosKGIhMNzflTyGlRCMM=' 
  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"
    }
  }
}