Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '939de0fa827f2d11010ec70ba0dfddb8486400e116692c9fc2d0291a8104defb' 
  AND token = '1XS33jMWrKU9CVX4+S7QxWCuBHRL31Bn9P1I9F+hVN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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